ORGANIZATION OF THE BONE MATRIX notes

Question 1

The matrix is organized into layers of bone called…….

Answer 1

lamellae

Question 2

In compact bone, there are three types of lamellae

Answer 2

Osteons (Concentric lamellae)
Interstitial Lamellae
Circumferential Lamellae

Question 3

Osteons (Concentric lamellae)

Answer 3

Target/bullseye pattern made of circular rings

Question 4

Interstitial Lamellae are?

Answer 4

fragments peices of old osteons made during the remodeling (remaking of the bone)

Question 5

Circumferential Lamellae are?

Answer 5

Layers/rings go all the way around the shaft of the bone

Question 6

In cancellous/spongy bone

Answer 6

the lamellae form trabeculae, or narrow

branches that connect together to form a loose web or net structure

Question 7

What can spongy bone do that compact bone can’t?

Answer 7

Bear stress from many different directions.

Question 8

What are found within the matrix of both compact and cancellous bone?

Answer 8

Osteocytes are

found in holes called lacunae

Question 9

The dendritic extensions of each osteocyte

are found in…..

Answer 9

tiny crack-like passageways called canaliculi

Question 10

Haversian Canal is also known as…..

Answer 10

Central Canal

Question 11

What is found in the Haversian/Central Canal?

Answer 11

Blood vessels and nerves

Question 12

Where are the blood vessels and nerves that are found in the Haversian/ Central Canals…..

Answer 12

in the center of osteons (parallel to bone shaft), and in Perforating/
Volkmann’s Canals (perpendicular or transverse to bone shaft).